Cant change SMTP Banner on Exchange 2010

When trying to change my Exchange 2010 receive connector to match my Reverse DNS PTR record I get an error message
:If the authmechanism attribute on a receive connector contains the value ExchangeServer, you must set the FQDN parameter on the Receive connector to one of the following values; ~.local or NETBIOS.
I am trying to match the Reverse DNS PTR because we get a #554 5.7.1 Message refused by ForgedIP check NDR from one particular server.
We have a valid PTR record that matches the outgoing FQDN.  How can I make the Receive connector use my internet domain FQDN?
CanOfWormsAsked:
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Nick RhodeIT DirectorCommented:
Powershell

Set-ReceiveConnector -Identity "Exchange Server Name" -Banner "mail.domain.com"

Are you trying to edit the default connector?  If you have mail.domain.com and your domain is domain.local you would create a new recieve connector for mail.domain.com etc.
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Simon Butler (Sembee)ConsultantCommented:
Don't waste your time trying to change the Receive Connector. It has nothing to do with your email delivery. It does mean you will fail some of the automated tests at mxtoolbox and the like, but that is a false negative result.

To confirm the banner is correct, use the test on this web site:
http://cbl.abuseat.org/helocheck.html

Do you have an SPF record?

Simon.
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CanOfWormsAuthor Commented:
Thank you Simon. I did run the test at this link you provided. From what I can tell my test "passed" showing IP address and valid FQDN.

My SPF does not include my outbound email servers IP address directly, nice.
v=spf1 +a +mx +ip4:XXX.XXX.XXX.XXX ?all

My outbound SMTP is not one of my MX.
The +A allows for any of my CNAMES to send email i believe?
not sure about the ?ALL. Shouldn't it be -ALL
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Simon Butler (Sembee)ConsultantCommented:
?All is a neutral.
-All is a hard fail.

You need to be very confident about where you email is coming from to use that. Most sites will use ~all, which is soft fail.

Simon.
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CanOfWormsAuthor Commented:
Some of you answered my question others solved my problem. Thanks!
To solve my problem I added an external DNS record that matched my SMTP banner. So I didn't end up changing or adding a new Receive connector.
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